华侨大学学报（自然科学版）2024，Vol.45Issue(2)：226-232,7.DOI:10.11830/ISSN.1000-5013.202311008
列车轴质量和土工格室加固道砟对路基沉降的影响
Influence of Train Axle Mass and Geocell Reinforcement Ballast on Roadbed Settlement
摘要
Abstract
A 3-dimensional finite element model and a geocell model of ballast subgrade are established.The phase loads are used to simulate the train dynamic load.The influence of train axle mass and geocell reinforce-ment ballast on roadbed settlement is studied.The simulation results show that the displacement changes be-tween each sleeper are basically consistent under the action of sinusoidal phase load.With the increasing of the train axis mass,the ballast settlement increases obviously.After laying geocell reinforces,the lateral displace-ment and vertical settlement of ballast reduce by 60％and 11％,respectively.Under the heavy load condi-tions,the reinforcement efficiency of geogrid reduces,but the stiffness of geocell can change its reinforcement efficiency.When the stiffness of geocell is between 400-800 MPa,the reinforcement effect on heavy-load road-beds is favorable.关键词
道床沉降/土工格室/轴质量/数值模拟/动荷载Key words
track bed settlement/numerical simulation/dynamic load/geocell/axle mass分类
交通工程引用本文复制引用
姚学昌,林福宽..列车轴质量和土工格室加固道砟对路基沉降的影响[J].华侨大学学报（自然科学版）,2024,45(2):226-232,7.基金项目
广澳高速公路改扩建科研资助项目(GAGSKY-2022-02) （GAGSKY-2022-02）
